If you get the error message ErrorStatus=error, ErrorThrown= Internal Server Error, this is because the global setting Expenses -Enable Foreign Currency is enabled.
To resolve this and allow users to submit new expenses claims, you need to disable this setting by following the steps below:
In the menu structure, click the Settings option.
Expand System Settings and click Global.
Search for Expenses - Enable Foreign Currency, in the name field.
Click Expenses - Enable Foreign Currency and change the Boolean field to False.
This controls whether foreign currency within expenses is enabled or disabled.
Click Save.